I think you need to define an alias-owner for each alias that needs the members to be tracked individually, like a mailing list. Otherwise, some batching of addresses is used with the observed results.
Cheers, Ken On Tue, Nov 16, 2010 at 12:37:15PM -0300, Mariel Sebedio wrote: > Here is a better explanation about my problem: > > When an e-mail is delivered to an alias, and one or more users in the > alias-list, had their mailbox locked, because they are reading their > mails through dovecot pop3 service, the original mail is delivered to > the members-list that don't have their mailbox locked and the mail gets > deferred. When this happens, the mail gets queued for all the > alias-list, so the users that already received the mail will have a > second copy of it when postfix redelivers the mail. > This will happen all over again until no mailbox is locked. > > Here's an example of the logfile > > 08F1DA6AFE3 1412 Tue Nov 911:53:49us...@xxx.xx.xx > (cannot update mailbox /var/spool/mail/user2 for user user2. unable to > lock for exclusive access: Resource temporarily unavailable) > us...@xxx.xx.xx > (cannot update mailbox /var/spool/mail/user3 for user user3. unable to > lock for exclusive access: Resource temporarily unavailable) > us...@xxx.xx.xx > alias-l...@xxx.xx.xx > > How can I avoid this behavior? In fact sendmail resolves this problem > efficiently. > > My postconf -n is: